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Built on ISFDB, Wikipedia, Wikidata and Open Library. Curated reading orders carry their reasoning on the page; the rest follow publication order. Data sources & licenses

© Loreful · data: ISFDB · CC BY

More like Obsolete Theorem

anchored on:science fictionrobotseuropeprehistoricmysterioustime travel+2 more

but

Mood

The mood the book leaves you in.

  • The reading experience is propelled by journeys, exploration, and physical risk; excitement and forward momentum dominate over dread or introspection.
  • Joy and loss are deliberately mixed; the resolution grants characters something real while taking something else away, leaving warmth and sorrow together.
  • The book demands work from the reader — dense prose, difficult structure, unfamiliar ideas, or morally uncomfortable material — as part of its intended effect.
  • Grim events, cruelty, or despair dominate the atmosphere, and the book does not soften them with comfort or comic relief.
  • The atmosphere is quietly unsettling — wrongness, unease, and the uncanny pervade the book without necessarily escalating into overt horror.
  • The book is built to move the reader; character feeling is foregrounded and major scenes aim at a strong emotional response.
  • Humor is a primary aim and the prose plays for laughs — comic situations, wit, or dialogue produce sustained comedy, not occasional levity.
  • The book insists that things can improve; effort and decency are shown to matter, and the arc bends toward better outcomes even through hardship.
  • The book teaches as it goes — real facts, history, science, or craft are conveyed in enough depth that learning is part of the reading experience.
  • The book is designed to uplift and motivate, presenting perseverance or achievement in a way that invites the reader to aspire or act.
  • The overall register is cheerful and easygoing; stakes are kept gentle and the book avoids dwelling on pain or dread.
  • Withheld information drives the experience; the book sustains enigmas and secrets the reader wants resolved, whatever its genre.
  • The book is contemplative and inward-looking, giving more weight to thought, memory, and meaning than to external events.
  • The book works as comfort reading — low tension, a soothing pace, and an atmosphere the reader can unwind in.
  • Grief, loss, or melancholy set the dominant register, and the book lets sorrow stand rather than resolving it into comfort.
  • Sustained suspense is the point; the book keeps the reader braced for what happens next through danger, pressure, or impending revelation.
  • Playful invention and charm define the register — fanciful conceits, light absurdity, and a narration that delights in its own oddity.

About

What the story runs on.

  • Stories in which extraterrestrial beings are central — as characters, cultures, or the object of the plot.
  • Stories about venturing into space to explore — survey missions, astronauts, and the frontier of the unknown beyond Earth.
  • Stories about minds with paranormal abilities — telepathy, telekinesis, precognition, empathy — and how societies handle those who have them.
  • Stories structured as a quest — a journey undertaken to find, deliver, or destroy something of great import.
  • Stories in which staying alive against nature, catastrophe, or scarcity is the central problem.
  • Stories of lovers kept apart by law, family, faith, or station, where the obstacle to love is the plot.
  • Stories of growing up — a young protagonist crossing from childhood into adult knowledge and responsibility.
  • Stories about who a character truly is — self-discovery, doubled lives, and the search for a self.
  • Stories in which a buried family truth — hidden parentage, crimes, or shames — surfaces and reorders the present.
  • Stories driven by maneuvering for power — factions, conspiracies, and statecraft conducted in shadow.
  • Stories in which war itself is the subject — combat, occupation, and what warfare does to soldiers and civilians.
  • Stories organized around investigating a killing — the case, the clues, and the pursuit of the killer, in any genre's clothing.

Shelf

Where it sits in the library.

    • Fiction built on magic or other supernatural elements that have no scientific explanation.
    • Secondary-world fantasy at large scale, where the fate of nations or the world turns on the protagonists' struggle.
    • Fantasy set in a recognizably modern city or contemporary world where the supernatural intrudes on everyday life.
    • Fantasy that blends in horror's atmosphere and imagery, keeping a fantastical frame around grim or frightening material.
    • Action-driven fantasy following warriors or rogues with personal stakes against sorcerous threats, rather than world-spanning conflicts.
    • Fantasy set in a real historical period or a close analogue of one, with magic woven into the era.
    • Fantasy in which protagonists cross from the ordinary world into another world through a portal or similar passage.
    • Fiction that retells or reworks a traditional fairy tale in a new form or setting.
    • Fantasy drawing directly on myths, legends, and folklore, retelling them or building on their figures and logic.
    • Fantasy of ghosts, vampires, shapeshifters, psychics, and similar phenomena, usually set in an otherwise ordinary world.
    • Fiction mixing science-fictional trappings with overtly magical or impossible elements in one setting.
    • Low-stakes fantasy emphasizing comfort, community, and everyday pleasures over conflict and peril.
    • Speculative fiction of pervasive moral ambiguity, violence, and cynicism that rejects heroic conventions — fantasy and SF alike.
      • Fiction that extrapolates from science and technology — future societies, space travel, or speculative inventions — within at least nominally natural laws.
      • Science fiction of interstellar scope — starships, galactic polities, and adventure across star systems.
      • Science fiction committed to scientific rigor, where technical plausibility constrains the story.
      • Science fiction centered on armed forces and warfare, told largely from a military point of view.
      • Science fiction of networked, corporate-dominated near futures, pairing high technology with social decay.
      • Science fiction styled on nineteenth-century steam-powered technology, often in a Victorian or pseudo-Victorian setting.
      • Fiction depicting an oppressive or catastrophic society, presented as a warning.
      • Fiction set after civilization's collapse, following survivors in the ruins of the old world.
      • Fiction in which characters move between past and future, and the mechanics or consequences of that travel drive the plot.
      • Fiction exploring a world where a historical event went differently and history diverged from ours.
      • Science fiction about humanity's first encounter and communication with an alien intelligence.
      • Science fiction in which extraterrestrial forces attack or occupy Earth and humanity resists.
      • Fiction whose primary aim is to frighten or unsettle the reader through dread, menace, or the monstrous.
      • Horror of vast, indifferent, incomprehensible entities before which humanity is insignificant, in the Lovecraft tradition.
      • Horror of decaying houses, buried family secrets, and oppressive atmosphere in the Gothic literary tradition.
      • Horror centered on hauntings and the returning dead.
      • Horror located in the mind — paranoia, obsession, and unreliable perception rather than external monsters.
      • Horror built around the reanimated dead and survival amid their outbreaks.
      • Horror defined by explicit, transgressive gore that refuses to cut away from violence.
      • Speculative fiction of the strange and uncanny that resists both natural explanation and standard genre categories.
      • Fiction organized around solving a crime or puzzle, typically following an investigator toward the identification of a culprit.
      • A puzzle-first mystery that lays out clues so the culprit's identity can be deduced before the reveal.
      • Crime fiction of moral ambiguity, fatalism, and hard-edged style, set among the corrupt and the doomed.
      • A mystery following the realistic routines of police work — forensics, interviews, and case-building.
      • A gentle mystery with an amateur sleuth, a small community, and violence kept off the page.
      • A mystery set in a past era, where the investigation works within that period's methods and society.
      • Fast-paced fiction driven by imminent danger, pursuit, or high-stakes conspiracy, built to sustain tension.
      • A thriller of espionage — agents, tradecraft, and intelligence services in conflict.
      • A thriller centered on lawyers and the courtroom, where litigation carries the suspense.
      • A thriller driven by detailed contemporary or near-future technology, often military or scientific.
      • A thriller whose tension comes from mental states and manipulation between characters rather than external action.
      • Fiction whose central plot is a romantic relationship and its development toward an emotionally satisfying resolution.
      • Romance in which one or both partners are supernatural beings, blending fantasy elements into the love story.
      • A fantasy-romance hybrid in which the romantic arc and the fantasy plot carry equal weight.
      • Romance set in a past era, with courtship shaped by the period's society and manners.
      • Romance set in the present day, without supernatural or historical elements.
      • Fiction set in a real past period, where the historical setting materially shapes characters and events.
        • General and literary fiction emphasizing prose style, character interiority, or formal ambition over genre plot conventions.
        • Fiction in a realistic world where magical events occur and are treated as ordinary, in the tradition of Latin American literature.
        • Fiction that ridicules people, institutions, or society in order to criticize them.
        • Fiction of dreamlike, irrational imagery and logic that breaks from realistic representation.
        • Fiction that plays with narrative convention through metafiction, fragmentation, and self-reference.
        • Fiction propelled by journeys, exploration, and physical peril, where action and survival carry the plot.
        • Adventure fiction of ships and seafaring — naval engagements, voyages, and life at sea.
        • Fiction of the American frontier West — gunmen, ranchers, and lawmen, typically in the late nineteenth century.
        • Fiction centered on soldiers, campaigns, and the experience of warfare, historical or imagined.
          • Fiction written primarily to amuse, using comedic situations, wit, or parody as its organizing principle.
            • Multi-generational fiction following a family or dynasty across decades, with inheritance and kinship as the through-line.
              • Fiction whose world runs on explicit game mechanics — levels, stats, and skills that characters can see and exploit.
                • Fiction about costumed or superpowered heroes and their conflicts with comparable villains.

                Practical

                How long a commitment, whether it stands alone, and whether it has finished.

                Tap a chip to ask for it · tap again to rule it out · once more to clear. Numbers show what would be left.

                • Cover of Across Horizons
                  Across Horizons

                  series · 1 book · 2020

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                • Cover of Timeline
                  Timeline

                  Michael Crichton · standalone novel · 1999

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                  Timeline is a science fiction novel by American writer Michael Crichton, his twelfth under his own name and twenty-second overall, published in November 1999. It tells the story of a group of history students who travel to 14th-century France to rescue their professor. The book follows in Crichton's long history of combining science, technical details, and action in his books, this time addressing quantum and multiverse theory.

                • Cover of Artifact
                  Artifact

                  Gregory Benford · standalone novel · 1985

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                  Archaeologists have discovered in Greece an object of alien origin buried 3500 years ago. A small black rock cube was unearthed in a Mycenaean tomb. However, archaeologists do not know that it was buried precisely because it would have had catastrophic effects on civilization if it remained on the surface.

                • Cover of Flashforward
                  Flashforward

                  Robert J. Sawyer · standalone novel · 1999

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                  Flashforward is a science fiction novel by Canadian author Robert J. Sawyer first published in 1999. The novel is set in 2009. At CERN, the Large Hadron Collider accelerator is performing a run to search for the Higgs boson. The experiment has a unique side effect; the entire human race loses their consciousness for about two minutes. During that time, nearly everyone sees themselves roughly twenty-one years and six months in the future. Each individual experiences the future through the senses of their future self. This "flashforward" results in countless deaths and accidents involving vehicles, aircraft, and any other device needing human control at the time of the experiment. The novel was adapted into the 2009 television series FlashForward.

                • Cover of Birds of Prey
                  Birds of Prey

                  David Drake · standalone novel · 1984

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                  Birds of Prey is a novel by science fiction / fantasy author David Drake, first published in 1984. It is related as a historical novel set in the Late Roman Empire, in the second half of the Third Century. There is a science-fictional twist to the story, starting with hints of a time warp on the very first page and slowly revealing to the reader—and the protagonist—what is really going on behind the scenes. The story is told in a very vivid style, suggestive of cinematography.

                • Cover of Technically Human
                  Technically Human

                  Christian Mann · standalone novel · 2024

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                  ● "Charlie, an American employee working in Berlin at NOVA, a giant Japanese firm and the world's first manufacturer of androids designed for blue-collar jobs, is given the most important project of his career: to live with humanity's first sentient android, Julia. After spending several days together, Charlie comes to the conclusion that Julia is far too advanced compared to her robotic peers—she's too human. As he attempts to uncover clues about her creation, both Charlie and Julia find themselves caught in an event that threatens the mammoth firm, his career, and the android's secret existence." ― quoted from this book's Amazon product page as of 2025-04-21

                • Cover of Unwise Child
                  Unwise Child

                  Randall Garrett · standalone novel · 1962

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                  "When a super-robot named Snookums discovers how to build his own superbombs, it becomes obvious that Earth is by no means the safest place for him to be. And so Dr. Fitzhugh, his designer, and Leda Crannon, a child psychologist acting as Snookums' nursemaid, agree to set up Operation Brainchild, a plan to transport the robot to a far distant planet. "... once into space, the Branchell becomes the scene of some frightening events—the medical officer is murdered, and Snookums appears to be the culprit. Mike the Angel indulges himself in a bit of sleuthing, and the facts he turns up lead to a most unusual climax." (From Project Gutenberg's version of the 1962 Doubleday edition, published 2007.)

                • Cover of Oxford Time Travel
                  Oxford Time Travel

                  series · 6 books · 1982

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                  Connie Willis's Oxford Time Travel novels are set at a near-future Oxford University where historians travel into the past as observers, constrained by a version of history that resists any change large enough to alter real events. Doomsday Book sends a medieval historian to what should be 1320 but turns out to be the Black Death year of 1348, intercut with a present-day epidemic at Oxford; To Say Nothing of the Dog returns to the same time-travel program for a lighter, Victorian-set story with different characters. The two novels share their setting and rules rather than a directly continuing plot.

                • Cover of The Jackpot Trilogy
                  The Jackpot Trilogy

                  series · 2 books · 2014

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                  William Gibson's Jackpot sequence begins with The Peripheral (2014), a science-fiction thriller cross-cutting between a near-future American town and a devastated London seventy years on. Gibson continued the same world in Agency (2020), set slightly later in the near-future timeline.

                • Cover of Ascension
                  Ascension

                  Nicholas Binge · standalone novel · 2023

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                  Ascension is a 2023 novel by Nicholas Binge, published in the UK by Harper Voyager, and in the US by Riverhead Books. It is published or forthcoming in twelve languages, and a film adaptation is in development. The novel tells the story of Harold Tunmore, a physicist, who joins a team to climb a mountain that has appeared in the middle of the Pacific Ocean.

                • Cover of Man Plus
                  Man Plus

                  series · 2 books · 1976

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                  Frederik Pohl's Man Plus follows Roger Torraway, who is surgically and cybernetically rebuilt into a post-human organism able to survive unprotected on the Martian surface, as part of a crash program to colonize Mars ahead of a predicted global crisis. The 1976 novel, which won the Nebula Award, is a clinical, unsentimental look at what such a transformation costs a person's sense of self. Thomas T. Thomas wrote the sequel Mars Plus, continuing the story of the Martian colony years later.

                • Cover of Tin Men
                  Tin Men

                  Christopher Golden · standalone novel · 2015

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                  "In the near future, the U.S. has deployed the Remote Infantry Corps: thousands of robots remote-piloted by soldiers whose bodies lie hidden in underground bases. But the worst occurs when anarchists set off a global pulse that shorts out electrical connections. In Damascus, Private Danny Kelso, Corporal Kate Wade, and their platoon realize they are trapped inside the Tin Men--something the government never warned them could happen. In Athens, the G20 Summit comes under fire, and a band of security soldiers and advisors risk everything in an effort to shepherd the President to safety. As chaos descends, and with anarchist Bot Killers on their trail, the Tin Men must survive a gauntlet of violence on the road from Damascus to the heart of Europe, half of them determined to stay true to their mission and save their president, half of them hellbent to save themselves.."--

                • Cover of Blade Runner Universe
                  Blade Runner Universe

                  series · 6 books · 1968

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                  Philip K. Dick's 1968 novel Do Androids Dream of Electric Sheep? follows bounty hunter Rick Deckard as he tracks escaped androids through an irradiated, near-abandoned San Francisco, using the hunt to probe questions of empathy and what separates human from machine. The novel became the basis for Ridley Scott's 1982 film Blade Runner, and Marvel Comics later published an illustrated adaptation of that film. Together the two trace the story's path from prose original to screen and comic-page adaptation.

                • Cover of The Masks of Time
                  The Masks of Time

                  Robert Silverberg · standalone novel · 1968

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                  From the back cover of the Ballantine first edition: "The year is 1999. The century is about to turn. The civilized world is prosperous but tense with fear about the still existing possibility of a major war. While in the large area that used called "underdeveloped" there is a hysterical conviction that the world will cone to an end with the arrival of the new century Into this explosive situation floats a creature calling himself Vornam-19 - and claiming to be a visitor from 1000 years in the future... The world is ready, indeed ripe, for a sign, an omen, a new cult. But no one realizes exactly what Vornaa-19 is in his own right."

                • Cover of The Door Into Summer
                  The Door Into Summer

                  Robert A. Heinlein · standalone novel · 1957

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                  From the first page of the Signet 6th printing: "An electronics engineer invents a wizard robot... only to find himself shanghaied by his ruthless partner and his gold-digging fiancee. The crafty pair forces him to submit to the "long sleep" - suspended animation for thirty years. But when he wakes up in the year 2000 A.D. the inventor makes a startling discovery. He learns that it is possible now to twist time forwards or backwards. And so he returns to the past bent on a mission... of revenge."

                • Cover of The Questor Tapes
                  The Questor Tapes

                  D. C. Fontana · standalone novel · 1974

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                  On back cover: "The gripping story of an artificial man ... a fast-paced adventure moving from the Los Angeles freeways to the bustling London metropolis ... and on to the distant peaks of Mount Ararat for a spectacular climax!"

                • Cover of The Orchid Cage
                  The Orchid Cage

                  Herbert W. Franke · standalone novel · 1961

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                  On a distant planet, not too different from Earth, there stands a mechanized city with no visible inhabitants. Obviously of a highly developed civilization, the question is who built it, where are they, and what can humans learn from them? Two teams of explorers enter into a competition to find the answers. There are no holds barred - almost anything goes to win the contest. But the city is capable of meeting trickery with trickery, violence with violence - and murder with justice. (from the back cover of the DAW Books first English language edition)

                • Cover of Rat Runners
                  Rat Runners

                  Oisin McGann · standalone novel · 2013

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                  "Four young thieves, one simple mission: Steal a black-leather box from the daughter of a murdered scientist without anyone noticing. But WatchWorld controls London now, and the organization knows everything. Every major street is monitored with heat-sensitive and X-ray cameras. Microphones record voices from hundreds of feet away, and drones watch from the sky. Patrolling the streets are Safe-Guards--part human and part robot, they can see through walls, hear your heartbeat, and analyze your sweat. But staying hidden is what Nimmo, Scope, Manikin, and FX do best. Using the city's blind spots, they navigate the criminal underworld until they're caught in a rat run of murder and deceit that might not let them out alive."--Back cover.

                • Cover of The Lost Millennium
                  The Lost Millennium

                  series · 4 books · 1996

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                • Cover of Shakespeare's Planet
                  Shakespeare's Planet

                  Clifford D. Simak · standalone novel · 1976

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                  Woken after a thousand-year voyage meant to find humanity a new home, Carter Horton finds his ship stranded for good, tended by the disembodied minds of three volunteers who gave up their bodies to fly it. Outside waits a world already crowded with strangers: a robot named Nicodemus, and an alien called the Carnivore who claims to have known a human, once, called Shakespeare, and to have arrived here through a tunnel across time. As more travelers arrive through that same tunnel, Horton has to work out what kind of planet he has actually landed on. A standalone novel from Clifford D. Simak.

                • Cover of Berserker (Fred Saberhagen)
                  Berserker (Fred Saberhagen)

                  series · 59 books · 1963

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                  The Berserker series is a series of space opera science fiction short stories and novels by Fred Saberhagen, in which robotic self-replicating machines strive to destroy all life.

                • Cover of The Sound of His Horn
                  The Sound of His Horn

                  Sarban · standalone novel · 1952

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                  The Sound of His Horn is a 1952 dystopian time travel/alternative history novel by the senior British diplomat John William Wall, written under the pseudonym Sarban. The novel has been included in several lists of the greatest fantasy novels of all time.

                • Cover of Beyond the Barrier
                  Beyond the Barrier

                  Damon Knight · standalone novel · 1964

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                  From the front flap of the Doubleday first edition: "Gordon Naismith was a physics professor at a large California university. The year was 1980, and by means of the university's duplicator he could personally teach in nine different classrooms simultaneously. Naismith was an average man in all but two respects: the reflexes were extraordinarily quick, and four years before in a plane crash he had lost all memory of his earlier life. Neither difference seemed important until one day a very unusual student in one of his classes asked a disturbing, extracurricular question: "Professor, what is a zug?" The question triggered a series of violent incidents, and soon Naismith himself, as well as the police, were beginning to wonder if the duplicator had reproduced him a tenth time. The answer lay ten thousand years in the future."

                • Cover of The Chronoliths
                  The Chronoliths

                  Robert Charles Wilson · standalone novel · 2001

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                  The Chronoliths is a 2001 science fiction novel by American-Canadian writer Robert Charles Wilson. It was nominated for the 2002 Hugo Award for Best Novel and tied for the 2002 John W. Campbell Memorial Award for Best Science Fiction Novel.